Method of making tools



Aug. 16,1927. 1,539,269

K. POTSCHNER METHOD OF MAKING Toms Filed April 26,. 1924 2 Sheets-Sheet1 a 1,639,269 K. POTSCITINER METHOD OF MAKING TOOLS Aug-1.1611927!"Filed April 26, 1924 2 Sheets-Sheet z ffaliPaialmlt Patented Aug. 16,1927.

* UNITED STATES KARL rorsonnnn,

or novnn, onio.

inn'rnon or MAKING 'rooLs.

Application filed April 26,

This invention relates to tools and more particularly to an improvedmethod of making tools such as illustrated in my copending applicationSerial No.'616,327, filed F ebruary 1, 1923, and is a continuation inpartof said copending application.

The objects of the invention are to provide an improved method offorming the frame portion of the wrench with a minimum oflabor andexpense. I

The above and other objects may be attained by first providing a.transverse hole in the blank from which the frame member is'made, thishole being located at a predetermined point and acting as a key to allsubsequent operations.

Two cutting operations are next performed, the cutters being moved intothe metal from opposite sides of the frame, two slight slotting, cuttingor punching operations removing corners of the metal left by thecutters, after which a broaching, keyseating or other cutting :tool ispassed through the slot thus formed to widen a portion thereof,providing guideways or tracks.

The method thus set forth in general terms is illustrated in theaccompanying drawings, in which- Fig. 1 is :aside elevation of theblank. from which the frame portion of the tool is formed;

Fig. 2 is a similar view after the first operation of providing thetransverse hole in the frame; 3

Fig. 3 shows the second operation per formed by a cutter;

Fig. 4 shows the third operation which is also a cutting operation;

Fig. 5 shows the frame after the two triangular slotting, cutting, orpunching operations; i

Fig. 6 shows the frame. after the guideway operation;

Fig. 7 is an edge elevation of the finished frame; and

Fig. 8 is a sectional viewof a partially completed frame made under aslightly dif ferent method. Y

Similar numerals'refer to similar parts throughout "the drawings.

The wrench to which the invention pertains is illustrated in mycopending application above referred to, and the present method concernsmore particularly the frame member illustrated at 1, and provided 1924.Serial No. 709,303.

with an integral jaw 2 and an integral handle portion 3.

This frame has an opening through its centralportion as shown at i toreceive a lever, and is provided with the guideways or tracks 5toreceive a movable jaw operated by the lever, all of which isillustrated in the copending application. above referred to, but whichhas no particular bearing upon the present application, ex-

cepting that the improved method includes the formation of the framemember to receive said other parts.

The blank shown in Fig. 1, may be formed by punching, forging or thelike, and ineludes the frame portion 1, integral jaw 2 and handleportion 3.

The first operation comprises the forming of the transverse hole 6 inthe frame portion of the blank by drilling, punching or the like at apredetermined point. The location of this transverse hole determines thefinished shape of the frame portion and acts as a key to each subsequentoperation. This hole may be forged in when the piece is forged, orpunched when the piece is blanked.

The next operation is shown in Fig. 3, a

into the transverse hole 6 and substantially meeting or overlapping thecut made by the cutter 7.

From an observation of Fig. 4, it'will be seen that by providing thetransverse hole 6,

the substantially triangular shaped portion of metal indicated at 11, isthus removed.

In thenext operation, the two substantially triangular portions of metalshown at 12 :and 13, are removed by slotting, punching or broaching orother similar operations, leaving the straight edges 12 and 13"respectively, as shown in Fig. 5.

The guideways or tracks 5 are then formed through the slotted portion ofthe frame, by drawing a breaching tool, a saw,

a slotter, or the like through the same, the finished tool member beingshown in Figs. 6 and 7.

From the above, it will be seen that the transverse hole 6 is the key tothe operations, as it furnishes the locating pointfor each subsequentoperation on the frame, and also removes the triangularportion of metalindicated at 11, which could not be removed in any other way on acommercial manufacturing basis.

This transverse hole thus furnishes the key to the most practical andinexpensive method known for manufacturing the frame member for thisclass of tool out of one solid piece of metal upon a commercial basis.It furnishes an economical means of deepening the slot beyond the reachof a slotting cutter, in that it removes the triangular portion ofmetal, indicated at 11, without removing the back wall. It furnishes anabsolute and unvarying locating point for all subsequent operations uponthis member.

Fig. 8 shows a partly completed frame member made by a slightlydifferent method, in which the transverse hole is not provided in theframe to start the operations.

In this form, the cutters 7 and 9 are operated in the directionsindicated by the arrows or at right angles thereto, in the manner abovedescribed, slotting the frame as shown at S and 10 in Fig. 8, leavingthe two substantially triangular portions of metal 12 and 13 to beremoved by broaching, slotting, punching or other obvious method. Itwill be noted that in this form, a considerably greater amount of metalhas to be removed at 12 than is necessary in the method above described.However, this method eliminates one operation, namely, the transversehole.

The guideways or tracks may be afterwards formed by breaching, asindicated at 5 and as above described.

1. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a jaw formed at one end and ahandle integrally formed at the other end thereof, forming a transversehole in said frame portion at a predetermined point, slotting the frameportion from opposite sides in a plane at substantially right angles tothe hole, the cuts substantially meeting or overlapping one another andthe transverse hole, and cutting away triangular portions of metaladjacent the point where the cuts meet at the side opposite to thetransverse hole.

2. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a jaw formed at one end and ahandle inte rally formed at the other end thereof, forming a transversehole in said frame portion at a predetermined point slotting the frameportion from opposite sides in a plane at substantially right angles tothe hole, the cuts substantially meeting or overlapping one another andthe transverse hole, and cutting away tr1- angular portions of metaladjacent to the point where the cuts meet and adjacent to the pointswhere the cuts meet the transverse hole.

3. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a jaw formed at oneend and ahandle integrally formed at the other end thereof, forming atransversehole in said frame portion at apredetermined point, slotting the frameportion from opposite sides in a plane at substantially right angles tothe hole, the cuts substantially meeting or overlapping one another andthe transverse hole, cutting away triangular portions of metal adjacentto the point where the cuts meet and adjacent to the points where thecuts meet the transverse hole, and broaching or otherwise cutting aguideway in the inner walls of the opening thus formed.

4. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a jaw formed at one end and ahandle integrally formed at the other end thereof, forming a transversehole in said frame portion at a predetermined point, slotting the frameportion from opposite sides in a plane at substantially right angles tothe hole, the cuts substantially meeting or overlapping one another andthe transverse hole, cuttingaway trian ular portions of metal adjacentthe point where the cuts meet at the side opposite to the transversehole, and broaching or otherwise cutting a guideway in the inner wallsof the opening thus formed.

5. The herein described method of forming a tool part, which consists inproducing a blank comprising a frame portion having a jaw integrallyformed at one end and a handle integrally formed at the other endthereof, forming a transverse hole in said frame portion at apredetermined point, slotting said frame portion from opposite sides ina plane at substantially right angles to the transverse hole, the slotsubstantially meeting or overlapping, removing a substantiallytriangular portion of metal from between the point where the slots meetand the jaw, and broac-hing or otherwisecutting a guideway in the innerwalls of the opening.

6. The herein described method of forming a tool part, which consists inproducing a blank comprisin a frame portion having a jaw integrallyformed atone end and a handle integrally formed at the other endthereof, forming a transverse hole in said frame portion at apredetermined point, slotting said frame portion from opposite sides .ina plane at substantially right angles to the transverse hole, the slotssubstantially meeting or overlapping, removing a substan tiallytriangular portion of metal from between the point where the slots meetand the jaw, and removing triangular portions of metal from the pointswhere the cutters meet the transverse hole, and broaching or otherwisecutting a guideway in the inner walls of the opening.

7. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a aw formed at one end and ahandle formed at the other end thereof, forming a transverse hole insaid frame portion at a predetermined point, slotting the frame portionfrom opposite sides .in a plane at substantially right angles to thehole, the cuts substantially meeting or overlapping one another and thetransverse hole, and cutting away portions of metal adjacent the pointwhere the cuts meet at the side opposite to the transverse hole.

8. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a aw formed at one end and ahandle formed at the other end thereof, forming a transverse hole insaid frame portion at a predetermined point, slotting the frame portionfrom opposite sides in a plane at substantially right angles to thehole, the cuts substantially meeting or overlapping one another and thetransverse hole, and cutting away triangular portions of metal adjacentto the point where the cuts meet and adjacent to the points where thecuts meet the transverse hole.

9. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a jaw formed at one end and ahandle formed at the other end thereof, forming a transverse hole insaid frame portion at a predetermined point, slotting the frame portionfrom opposite sides in a plane at substantially right angles to thehole, the cuts substantially meeting or overlapping one another and thetransverse hole, cutting away portions of metal adjacent to the pointwhere the cuts meet and adjacent to the points where the cuts meet thetransverse hole, and broaching or otherwise cutting a guideway in theinner walls of the opening thus formed.

10. The method of forming a tool part, which consists in providing ablank comprising a frame portion having a aw formed at one end and ahandle formed at the other end thereof, forming a transverse hole insaid frame portion at a predetermined point, slotting the frame portionfrom opposite sides in a plane at substantially right angles to thehole, the cuts substantially meeting or overlapping one another and thetransverse hole, cutting away portions of metal adja- Y cent the pointwhere the cuts meet at the side opposite to the transverse hole, andbroaching or otherwise cutting a guideway in the inner walls of theopening thus formed.

In testimony that I claim the above, I have hereunto subscribed my name.

KARL POTSOHNER.

